How severe is CVE-2020-35908?

CVE-2020-35908 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-35908 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35908?

CVE-2020-35908 affects Rust-lang Future-utils. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35908?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-35908 published?

CVE-2020-35908 was published on 2020-12-31 and last updated on 2026-06-17.

CVE-2020-35908

CVE-2020-35908 is a medium-severity vulnerability in Rust-lang Future-utils with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Rust-lang Future-utils
Published: 2020-12-31
Last modified: 2026-06-17

Description

An issue was discovered in the futures-util crate before 0.3.2 for Rust. FuturesUnordered can lead to data corruption because Sync is mishandled.

Frequently asked questions

What is CVE-2020-35908?: An issue was discovered in the futures-util crate before 0.3.2 for Rust. FuturesUnordered can lead to data corruption because Sync is mishandled.
How severe is CVE-2020-35908?: CVE-2020-35908 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-35908 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35908?: CVE-2020-35908 affects Rust-lang Future-utils. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35908?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35908 published?: CVE-2020-35908 was published on 2020-12-31 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2020-0062.html

Affected products (1)

cpe:2.3:a:rust-lang:future-utils:*:*:*:*:*:*:*:*

More vulnerabilities in Rust-lang Future-utils

CVE-2020-35905 — Medium (CVSS 4.7): An issue was discovered in the futures-util crate before 0.3.7 for Rust. MutexGuard::map can cause a data race for…

All CVEs affecting Rust-lang Future-utils →